小数方程计算专项练习题
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小数方程计算专项练习题
小数方程专项练(有答案)
1.(x + 0.55) × 4 = 3.6
2.2x ÷ 8 = 0.8
3.1.5 × 2 + 2x = 5
4.4.7x = 1.9x + 7
5.12.6(x + 4.8) ÷ 2 = 63
6.12.5 + 4x = 21.7
7.13.5x - 8.5x = 20
8.6x - 8.5 × 4 = 20
9.36 ÷ x = 0.4
10.9.6x - x = 43
11.3x - 4 × 0.9 = 46.2
12.3.5x - 4 × 7 = 42
13.x - 0.9x = 81.9
14.3.8 + 5x = 12.3
15.4(0.3 + x) = 6.8
16.8x - 1.6x = 19.2 17.x ÷ 1.8 = 1.62
18.22.5 × 2 + 5x = 135
19.1.4x + 9.8 = 22.4
20.2(x - 3) = 11.6
21.68 - 4.4x = 24
22.1.6 × 8 - 5x = 2.3
23.2.5x ÷ 20 = 16
24.6.2x - x = 41.6
25.x ÷ 0.5 = 48.6 × 2
26.5x - 7.8 = 20.2
27.2.5x - x = 1.8
28.(4.5 + x) × 2 = 13
29.7x - 2 × 9 = 80
30.13x - 7.5x = 18.7
31.(x + 12) × 6 = 108
32.4x + 3 × 0.7 = 6.5
33.2(x - 0.5) = 1.6
34.3x × 2.34 = 4.914
35.1.44 ÷ x = 0.4
36.2x + 6 = 12.5 37.2.5x - x = 1.2
38.(4.5 + x) × 2 = 63
39.2x - 2.5 × 10 = 15
40.3.85 + 1.5x = 6.1
41.13(x + 2.5) = 169
42.2x - 2 + 1.8 = 3.6
43.7(x - 1.2) = 3.57
44.2 + 1.8 - 2x = 3.6
45.7x ÷ 0.3 = 4.2
46.6x + 4x - 11 = 32.9
47.7(x - 1.2) = 2.87
48.2.4 + 3.4x = 5.8
49.5(x - 1.2) = 35
50.2.5x + 51 = 17 × 8
51.2.4x + 1.6x = 2.2
52.8(x - 6.2) = 41.6
53.0.5(x - 0.5) = 7.5
54.(9x + 1.5 + 7x) ÷ 5 = 5.1
55.3x + 7 = 29.5
56.5x - 2.8 × 1.2 = 1.04 57.4x + 6x = 28.5
小数方程专项练(附答案)
1.解:(x + 0.55) × 4 = 3.6
x = (3.6 ÷ 4) - 0.55
x = 0.175
2.解:2x ÷ 8 = 0.8
x = 0.8 × 8 ÷ 2
x = 3.2
3.解:1.5 × 2 + 2x = 5
2x = 5 - 3
x = 1
4.解:4.7x = 1.9x + 7
2.8x = 7
x = 2.5
5.解:12.6(x + 4.8) ÷ 2 = 63
x + 4.8 = 10
x = 5.2
6.解:12.5 + 4x = 21.7
4x = 9.2
x = 2.3
7.解:13.5x - 8.5x = 20
5x = 20
x = 4
8.解:6x - 8.5 × 4 = 20
6x = 20 + 34
x = 9
9.解:36 ÷ x = 0.4
x = 36 ÷ 0.4
x = 90
10.解:9.6x - x = 43
8.6x = 43
x = 5
11.解:3x - 4 × 0.9 = 46.2
3x = 46.2 + 3.6
x = 16.6
12.解:3.5x - 4 × 7 = 42
3.5x = 42 + 28
x = 20
13.解:x - 0.9x = 81.9
0.1x = 81.9
x = 819
14.解:3.8 + 5x = 12.3
5x = 12.3 - 3.8
x = 1.7
15.解:4(0.3 + x) = 6.8
1.2 + 4x = 6.8
4x = 5.6
x = 1.4
16.解:8x - 1.6x = 19.2
6.4x = 19.2
x = 3
17.解:x ÷ 1.8 = 1.62
x = 1.62 × 1.8
x = 2.916
18.解:22.5 × 2 + 5x = 135
5x = 135 - 45
x = 18
19.解:1.4x + 9.8 = 22.4
1.4x = 22.4 - 9.8
x = 9
20.解:2(x - 3) = 11.6
2x - 6 = 11.6
2x = 17.6
x = 8.8
21.解:68 - 4.4x = 24
4.4x = 68 - 24
x = 11
22.解:1.6 × 8 - 5x = 2.3
12.8 - 5x = 2.3
5x = 10.5
x = 2.1
23.解:2.5x ÷ 20 = 16
2.5x = 20 × 16
x = 32
24.解:6.2x - x = 41.6 5.2x = 41.6
x = 8
25.解:x ÷ 0.5 = 48.6 × 2
x = 48.6 × 2 ÷ 0.5
x = 194.4
26.解:5x - 7.8 = 20.2
5x = 28
x = 5.6
27.解:2.5x - x = 1.8
1.5x = 1.8
x = 1.2
28.解:(4.5 + x) × 2 = 13
9 + 2x = 13
2x = 4
x = 2
29.解:7x - 2 × 9 = 80
7x = 80 + 18
x = 14
30.解:13x - 7.5x = 18.7
5.5x = 18.7
x = 3.4
31.解:(x + 12) × 6 = 108
6x + 72 = 108
6x = 36
x = 6
32.解:4x + 3 × 0.7 = 6.5
4x = 6.5 - 2.1
x = 1.1
33.解:2(x - 0.5) = 1.6
2x - 1 = 1.6
2x = 2.6 x = 1.3
34.解:3x × 2.34 = 4.914
x = 4.914 ÷ 7.02
x = 0.7
35.解:1.44 ÷ x = 0.4
x = 1.44 ÷ 0.4
x = 3.6
36.解:2x + 6 = 12.5
2x = 6.5
x = 3.25
37.解:2.5x - x = 1.2
1.5x = 1.2
x = 0.8
38.解:(4.5 + x) × 2 = 63
9 + 2x = 63 ÷ 2 9 + 2x = 31.5
2x = 22.5
x = 11.25
39.解:2x - 2.5 × 10 = 15
2x = 15 + 25
x = 20
40.解:3.85 + 1.5x = 6.1
1.5x = 6.1 - 3.85
x = 1.1
41.解:13(x + 2.5) = 169
13x + 32.5 = 169
13x = 136.5
x = 10.5
42.解:2x - 2 + 1.8 = 3.6
2x = 3.6 + 0.2
x = 1.9
43.解:7(x - 1.2) = 3.57
7x = 3.57 + 8.4
x = 1.77
44.解:2 + 1.8 - 2x = 3.6
2x = 3.6 - 3.8
x = -0.1
45.解:7x ÷ 0.3 = 4.2
x = 4.2 × 0.3 ÷ 7
x = 0.18
46.解:6x + 4x - 11 = 32.9
10x = 43.9
x = 4.39
47.解:7(x - 1.2) = 2.87
7x = 2.87 + 8.4
x = 1.51